Engine Test Chamber

Engine Test Chambers for NVH Analysis

Automotive and generator manufacturing industries require engine test chambers to conduct precise and repeatable testing for Noise, Vibration, and Harshness (NVH) analysis. These chambers are engineered to deliver a controlled acoustic environment, ensuring highly accurate data collection for product testing and development.

Proper acoustic treatment in these test cells prevents excessive internal noise from escaping the chamber while simultaneously blocking external noise from entering. This ensures that all testing is conducted under ideal acoustic conditions.

To design effective NVH testing environments, a comprehensive site survey and parameter study is typically carried out by acoustics professionals and engineers. These assessments guide the custom design of acoustical modules, tailored to specific industrial requirements.

Vehicle Semi-Anechoic Chambers (VSACs)

VSACs are advanced acoustic chambers designed to support interior and exterior noise and vibration measurements of vehicles, whether 2WD or 4WD. These chambers enable critical tests such as:

• Run-up and coast-down noise analysis

• Constant speed operation noise evaluation

• Intake and exhaust noise testing

• Engine compartment and structural vibration measurements

• Steering wheel and seat rail vibration studies

VSACs facilitate a wide range of NVH diagnostic tasks, including:

• Powertrain mounting assessments

• Acoustic intensity and source localization

• Operational deflection shape identification

• Transfer path analysis for structure-borne vibration

• Engine power performance evaluations

All chambers are engineered to comply with international acoustical testing standards such as ISO 3744 and ISO 3745, ensuring accurate and reproducible test data.

Design Highlights

• Cut-off Frequency: Typically designed for a 50 Hz cut-off frequency to capture low-frequency engine noise with high fidelity.

• Anechoic Wedges: Equipped with metal-based anechoic wedges offering 0.99 absorption. These wedges are engineered to be durable and maintain performance in high-load industrial environments.

• Custom-Built Facilities: Chambers can be tailored for different vehicle sizes, testing equipment, and environmental control requirements.

Why Use Engine Test & VSAC Chambers?

• Enables accurate and repeatable NVH testing in a controlled acoustic environment

• Reduces external acoustic interference for indoor vehicle noise measurement

• Supports compliance with international standards for noise testing

• Enhances R&D capabilities and product validation cycles